docs: fixed forgotten docker registry organization names (HumanSignal…

…#6031)

### PR fulfills these requirements
- [x] Commit message(s) and PR title follows the format
`[fix|feat|ci|chore|doc]: TICKET-ID: Short description of change made`
ex. `fix: DEV-XXXX: Removed inconsistent code usage causing intermittent
errors`
- [x] Docs have been added/updated (for bug fixes/features)
- [x] Best efforts were made to ensure docs/code are concise and
coherent (checked for spelling/grammatical errors, commented out code,
debug logs etc.)
- [x] Self-reviewed and ran all changes on a local instance (for bug
fixes/features)

### Describe the reason for change
Documentation had wrong command to run the container. To be exact it was
wrong organization owner on dockerhub. Now it points to the right
organization owner name.

docs/source/tutorials/tesseract.md

@@ -47,7 +47,7 @@ Launch Label Studio. You can follow the guide from the [official documentation](
    docker run -it \
       -p 8080:8080 \
       -v `pwd`/mydata:/label-studio/data \
-      humansignal/label-studio:latest
+      heartexlabs/label-studio:latest
    ```
 
    Optionally, you may enable local file serving in Label Studio
@@ -58,7 +58,7 @@ Launch Label Studio. You can follow the guide from the [official documentation](
       -v `pwd`/mydata:/label-studio/data \
       --env LABEL_STUDIO_LOCAL_FILES_SERVING_ENABLED=true \
       --env LABEL_STUDIO_LOCAL_FILES_DOCUMENT_ROOT=/label-studio/data/images \
-      humansignal/label-studio:latest
+      heartexlabs/label-studio:latest
    ```
    If you're using local file serving, be sure to [get a copy of the API token](https://labelstud.io/guide/user_account#Access-token) from
    Label Studio to connect the model.
@@ -175,4 +175,4 @@ Example below:
 
 Reference links: 
 - https://labelstud.io/blog/Improve-OCR-quality-with-Tesseract-and-Label-Studio.html
-- https://labelstud.io/blog/release-130.html
+- https://labelstud.io/blog/release-130.html